Tube-rolling machine.



0. PPRENGLE. 4 TUBE ROLLING MACHINE.-

' APPLICATION TILED BS0718, 1910. 987,598

Patented Mal-L21, 1911..

2 snnnT-s-s'anm 1.

invented certain new and useful bending metal plates cold, and

OTTO PFRENGLE, 0F STUTTGAR' I, GERMANY.

" TUBE-ROLLING MACHINE.

'10: all whmn it ma/y concern: p

- it known that I, Orro Prasncpn, sub; je'ct of the German Empire, and resident of 2B Alleenstrasse, Stuttgart, Germany, have inents in Tube-Rollin Machines, of which the following is a specification, reference being had to the accompanying draw ngs.

My invention relates to machines for it is directed tothat well-known class comprising a pluralityof practically independent organisms or elemen-ts-m other words a series of sepa-' rate small machines-which are secured end- 1 to-end and combined with a mandrel and machine, otherwise 80 ment, according to my invention, comprises,

with operating mechanism both common to each organism or element, thus constituting one long machine capable of being extended or reduced lengthwise to accommodate long or short plates. 1 p

The object of my invention is to dproduce long tubes of comparatively small iameter that will be of true shape throughout and therefore ready, when removed from the to be welded, soldered, riveted or dealt with, without necessitating any subsequent treatment other'than that attendant upon such operations;

To achieve my object each organism or eleessentially, a pair ofbending devices which are slidably arranged radially of the mandie] at o posite sides thereof so that they can be a vanced toward, or receded from, the same, and can also be moved forward and backward circumferentially thereof by mechanism common to all the organisms or elements, to shape the plate situated between the bending devices and the mandrel. My invention, further, comprises certain conjunctive members all tending to produce a machine of simple and compact construction, and one that will efliciently attain-my purpose, as I will now explain with reference to the accompanying drawings section on'the line 11-13 inFi'g. 1. Fig. 3

Eigure 1' is a longitudinal sectional elevation showing two of the constituent organisms or elements complete, and part of a third one. Fig. 2- is a vertical transverse is a horizontal section onthe line CD in Fig. 2 of some of the components. Fig. 4 is a fragmentary vertical transverse section representing one Qperativeposition of the aforesaid bending devices and the resulting Specification of Letters I'atent.

Application filed December 19, 1910. Serial No. 598,050.

Improve- Patented Mar. 21, 1911.

shaping of the plate. Fig. 5 is likewise a fragmentary vertical transverse section illustrating the shaping of the plate after a further operation of the said bending devices.

Figs. 1, 2, and 3 are drawn to the same scale, as also are Figs. 4 and 5, though the latter are drawn to a larger scale than the other figures, but in all the same reference numerals are employed to denote the same parts. 7

The organisms or elements are marked-10, 11, and 12 respectively, and each comprises a standard 13 whiclnas shown in Fig. 1, in

the case of the intermediate organisms or elements is common to a pair of them "This standard 13, as depicted in Fig. 2, is of boxlike form at the base, and of segmental contour at the top to permit the passage of the.

concentric mandrel 14 and the plate 15., both a of which are supported in any usual way as I will presently point out. These several standards 13 13 are secured *together in any suitable fashion, such as by bolts 16-16 as indicated in Fig. 2. v

The standards 13 13, as illustrated best in Fig. 1, support, inter alia, rotatable segmental racks 17- 17 a rack being situ ated close to each side of every standardand by, and bet-ween, each adjoining pair of these racks 17-17 are supported the aforesaid slidable bending devices, each consisting'of an upper cheek 18 with a jaw 19 at one side of the mandrel 14 and a lower cheek 20 with a,jaw 21 at the other side thereof. Theseseveral parts are arranged as I will now explain.

Every standard 13 is provided at both sides with a segmental groove 22 for the reception of a tongue 23 provided on the rack 17, and in this way is the rack guided as it is rotated backward and forward around the mandrel 14 as it is intended to. I

be simultaneously with the others, to effect the corres onding movement of the respective bending devices 18-19 and 20-21. This rotation is accomplished .by any suitable mechanism, such as that indicated in -Fig. 2, which consists of a common shaft 24 supported as at 25 on the standards 13-43 and carrying a pair of loose pulleys-one of which is shown and marked 26-adapted to be connected to, and disconnected from,

the shaft 24 by clutches and be driven from a suitable source of power by open and crossed belts. The motion thus imparted 17-17 b'y a'toothed wheel 27 mounted on to the shaft 24 is transmitted to the racks the shaft 524 and driving a toothed wheel 28 mounted on a shaft 29 supported as at 30 on the standards 13--13, which shaft is common to all the racks 1T-1T and carries a corresponding number of toothed wheels 3131 for gearing with and thereby operating the racks 1717.

As previously remarked, and as clearly illustrated in Fig. 1, a check 18 and a Check 20 are supported by, and between, every pair of the racks 1717, such racks being those adjoining on the corresponding sides of every pair of the standards 13-13. For this purpose each rack 17 is at the side remote from its standards 13 provided with an upper groove 32 and a lower groove 33, both of which are straight and at right angles to the axis of rotation. These grooves 32 and 33 receive the ends of the respective cheeks 1S and 211 which are de igned to'slide therein radially inward and outward with respect to the mandrel l-t under the inlluence of hand mechanism as will be subsequently described. thus maintained in position to a certain extent on the standards 13. 123 by the interposition of the cheeks 1S and '30. and to a further extent by a rod 34 carried by, and between. their upper extremities as indicated at 35, which parts 211 and 255. according to the illustration. also serve to support the hand mechanism of the cheeks 18 and Qt) for operating them in unison. This mechanism (which of course'may be of other kind than that shown) comprises a shaft ilt'i common to all the cheecks [S --18 and 20-20 and supported by arms 37-37 on the rods: 234 234. l lach check 18 and 20 is provided with a nut 38 at each end for co-acting with a common screw 39 furnished at one part for the nut 238 of one cheeck' with a righthanded thread, and at. another part forthe nut38 of the other check with a left-handed thread. This screw 30 is also furnished at the upper end with a bevel wheel 40 for gearing with a complementary wheel 41 on the shaft 36 which is titted with a hand wheel 42 for operating it. 'lherefore it will be seen on rotating the shaft 36 by the hand wheel 42 the several cheeks 18 -18 and 20-Q0 with their respective jaws 19l9 and 2l91, through the medium of the bevel wheels 10- -10 and 41-- --41, and screws tin--39 either'approach the mandrel 14 or recede from it. in unison. Further it will be manifest that, as this n'iechanism is carried by the racks 1.7 '17 through thea gency of the rods ii-t- 3%. it revolves therewith around and concentric with the mandrel 14 and can be actuated to operate the cheeks .18 -18 and '10-- .20 whatever the position they may be in consequent. on the rotation of the racks 17-----1'T.

. In the segmental cavity of ea h standard 13 and concentric with the mandrel 14, a

The racks 1T, 17 are semicircular guide-piece 43 is fixed so that it may be removed, for which purpose it is secured in place by keys (one of which is shown at 44 in Fig. 2) or in any other way. The purpose of these guide-pieces 43-43 is to prevent the metal springing at the standards 1313 while being bent, andthe object of having them removable is to-permit of them being changed to suit different diameters of tube. -To also prevent springing of the tube in course of production the jaws 1t 1t) and ll-=21 on the cheeks 1818 and 2020 respectively are, as illustrated in Figs. 2 and 4. arranged angularly to each other and to the mandrel 14.

As previously remarked the mandrel 14 and plate 15 maybe supported in any customary fashion. aml well-known ways are illustrated. The mandrel 14 is suspended from the extreme end standards 1313 as represented at the right hand end of Fig. 1 by a link -15 pivoted'on the standard .13 and a coinplementary removable. pin 46. The plate 15 is carried by rollers 4747 and by brackets or tables 48--48. A roller-47 is situated .between every pair of the standards 13---l3, being journaled ateach end in the contiguous standard as indicated at 49. A bracket or table 48 is applied to each standard 13. and it is arranged so that it may be adjusted in height as usual by the mechanism marked generically 50 which. as it is of the ordinary type, need not be described, further, than to say. that in the specific example illustrated, it comprises lifting-and table-supporting cams fixed on a rotary shaft provided with means for rotating the same to shift the cams with respect to. rollers 1 arried by the table and resting on the cams.

The table is freely slidable vertically and is upheld by said rollers resting on said cams and following the curvature thereof to raise or lower the table as the cams are rotated.

Having described the construction of the machine I will now 1 xplain its operation.

Assuming the production of a tube is about to be. commenced. then thovarious parts are in the positions depicted in Fig. 2, excepting that itis to be supposed the plate 1.1 is not in the position shown, and that the bending devices, consisting of the cheeks -1818 with their jaws 1919 and the cheeks 20-20 with their jaws 21-21.-

are farther apart. First, then, the plate 15 is slid over the brackets or tables 4848 and rollers 47-47 and inserted between the mandrel 14 andthe jaws 2121 of the lower cheeks 20- 20. Now the cheeks 18-18 and 20-20 are simultaneously advanced to bring the jaws 2l--21. of the latter cheeks into contact with the plate 15, by turningthe hand wheel 42 and thereby operating the mechanism comprising the shaft 36, the bevel wheels 40---t0 and 4l-41, and the screws 3H- 39. Thus the position illustrated in :Fig.2 results; Now the machine is going, that .is to say the power is transmitted to the shaft 24 and thence through the. toothed wheels 27 and 28, the shaft 29 and ,the'toothedwheels til-31 to the racks 17.-17

which thus are turned in unison around the mandrel 14, and, in consequence of their connection with these racks 1717, so are the cheeks 18-1S witlrtheir jaws 'l)-19- and the chee s -20 with their jaws 2l21 alongwith their hand operating mechanism,

20; "atii g the hand-wheel 42 and through it the allied, mechanism, and likewise the motion hence the cheeks 2()20 with their jaws ofthe shaft at is reversed andthusthe racks together with the cheeks 1S,-18 and 20- 20 with their conjunctive parts are turned back to the original position-that shown in Fig. 2- the mandrel 14c and partially-bent plate "-15, however, remaining in place. Next thefjaWS 19-19 and 21-2l are 80,11

a; n'closed as hefor andthe racks l7-'17 ewise ope/ratedfor another quarteriof a revolutionor'thereabout, when the condimeager the plate ll;- illustrated in. ll ig, 5 will ensue, whereupon the operation is reversed,

and the operations already explained again j carriedout sucoessively lntil' the bending is ';1comp1eted.,- To removetlie finished tube, the 11316.46 at one' end of the mandrel 14: is with drawn and the 'link,45 swung aside.- 40

.' What I claim is 11' 1;,In'a bending machine for making metal tubes comprisinga plurality of independent organisms or umts secured end-to-endand combinedwitha mandrel and with operat- (fi- "1; ,jsms, the combination is one such organism ing' mechanism, both 'connnonto said organwithfsaid common mandrel and-said common operatin meclia1'ns1n, of avpair of bending;

vdevice ls slidably. arranged radiallf"of said {mandrel at opposite sides thereof sothat standards, and rollers they can be advanced toward, or receded from, the same, and'also rotatable forward and backward circumferentially and concentrically' thereof, to shape theplate situatedabetween said bending 'dGVlCGS and said in andrels .2. A bendingmaehine for making metal tubes coi'nprising, in combination, a pluraL ity of standards, a mandrel suspended from,

and led through, said standards, segmental racks rotatably arranged at both sides of each of said standards, bending devices'consisting of a pair'of cheeks with jaws, slidably supported by, and between, every pair 0t said racks and radially at either side of said mandrel, niechanlsm for operatlng said racks in common, and mechanism for operat- J ing said bending devices in common, 3. A bend ng machine comprising, in combination, a plurality of standards having,

segmental grooves and provided with removable cur'ved guide pieces, a mandrel arranged arranged beside said standards and having means slidably engaging said grooves there of, cheeks slidable in said oheelnreceiving grooves of said racks and arranged radially larly arranged jaws, mechanismfor operatingsaid racks in unison, and mechanism for ope'rating said cheeks in unison. f

transversely of said standards, segmental racks having ChOGlC-IQCOIVIDg grooves, and

of said mandrel and provided ,with angw. 1

4, A bending machine for making metal tubes comprising, in combinatioin-aplurallty'of standards, a mandrel suspended from,

and'led through, said standards, segmental" racks rotatably arranged at both side's 'oi each of said standardsjbending devices slidably supported by,-'andbetween, every pair of said'rachs and'radially of said mandrel, mechanism for operating saidracks'simultaneou'sly, mechanism "for simultaneously operating said bending devices, guide-pieoes on said standards, brackets '01- tables on said journaled between saidstandards' V v n OTTO 'PFRENGLE.

Witnesses.

.WILHELM KLo'rz, FRIDA' KLUIBA, 

